Robert Downey, Jr's son has been charged with felony possession of a controlled substance following his arrest in June (14).

Indio, 20, was caught smoking from a pipe while sitting in a car in West Hollywood and booked by police.

In addition to the felony count, Indio Downey has been charged with misdemeanour possession of drug paraphernalia.

His dad, who has battled his own drug demons in the past, publicly offered his son his support and thanked the Los Angeles County Sheriff's Department officers who arrested his boy for "their intervention".